Lock



July '9, 1929.

H. W. EVANS LOCK 2 Sheets-Sheet 1 Filed Dec. 15, 192'? INVENTOR WEvans BY ATTORNEY WITNESSES H. 31%

July 9, 1929. .4, w, EVANS 1.720.596

LOCK I Filed Dec. 15, 1927 2 Sheets-Sheet 2 INVENTOR HWEmns ATTORNEY BY 2 g- Patented July 9, 1929.

" UNITED ISTVA TES HARRY w. EVANS, or new YORK, N. Y.

LOCK.

Application filed Decembcr 15, 1927; Serial No. 240,307.

The present invention is concerned with the provision of a lock which may have a wide range of utility, but which finds one of its preferred embodiments in a door lock.

An object of the invention is to provide a locking mechanism in which a relatively massive bolt arranged on the inside of the door may be thrown with a little manual effort by turning ahandle on. the Outside the door, and a relatively light, simple key controlled mechanism normally locks the bolt throwing handle. 1

Another object of the invention is to render the bolt throwing handle locking mechanism entirely inaccessible to an intruder, in other words substantially proof against jimn'iying, so that a key or its equivalent is always necessary before the bolt can be thrown from the outside of the door.

Other and more general objects of the invention are to provide lock of simple, practical construction, which ill be rugged, dura ble and efficient in use and well suited to the requirements of economical manufacture and convenient installation.

lVith the above noted-and other objects in view, the invention consists in certain novel features of construction and combinations and arrangements of parts, as will be more fully hereinafter set forth and pointed out in the claims. The invention may be more fully understood from the following descrip tion in connection with the accompanying drawings, wherein Figure 1 is a rear or inside elevational view of my improved lock, the door being omitted for the sake of clearness.

Fig. 2 is a top plan view thereof, the door, frame and bolt keeper being indicated in section.

Fig. 3 is a vertical sectional view on the line 3-3 of Fig. 1.

Fig. 4 is an. outside view of the door with the lock in position thereon.

, In the drawings I have used the numeral 10 to indicate a door of the hinged type mounted in a frame 11.

A relatively massive horizontal bolt 12 is guided for sliding movement in brackets 13 fixed to the rear of the door. lVhen the bolt 12 is projected it is adapted to enter a keeper 14 on the frame 11 and lock the door 10 against opening.

In order that the bolt 12 may be shot with comparatively little manual effort, a spindle 15 is rotatabl y mounted in the door. The exposed outer end of this spindle carries an operating handle 16 and the inner end thereof carries apinion 1T meshing with rack teeth 18 cut in. the lower edge of the bolt 12.

Preferably less than a full turn of the han dlc 16 is necessary to project or retract the bolt. This handle and its associated spindle and pinion may be locked against movement with the bolt 12 in the keeper 14-. Such locking is ellected by a spring bolt 19 the re duced extension 20 of which snaps into notch 21 in the pinion 17. Notch 21 it may be noted, preferably does not extend transversely through the pinion, but is only deep enough to receive the small projection 20.

Bolt 19 is mount-ed for vertical reciprocating movement in a casing 22 secured to the inner face of the door 10. This casing to gether with the spindle 23 extending through the door and the tumbler casing 24 at the outer end of the spindle are of entirely conventional construction and details of their operating mechanism are not shown. Suffice it to say that a key 25 inserted in the tumbler casing is operative to rotate spindle 23, thereby retracting the spring bolt 19 and releasing pinion 17 for free turning movement.

To permit ready opening of the door from the inside, the spindle 23 is provided with an operating handle 27 at its inner end, and a handle 26 is carried by the inner face of the bolt 12. To open the door from the inside, the handle 27 is rotated, withdrawing bolt 19. The handle 26 is simultaneously grasped and the bolt 1.2 retracted. As this operation is performed, much of the weight of the bolt 12 is sustained by the idling pinion 17 which makes the bolt slide easily.

To open the door from the outside, key 25 is inserted and turned, withdrawing spring bolt 19. Handle 16 is turned, causing pinion 17 to retract bolt 12. Again little manual effort is required, due to the powerful leverage afforded by the pinion.

The pinion locking mechanism is entirely inaccessible from the outside of the door and no tool may be used to force it.

Obviously, various changes and alterati ons might be made in the general form and arrangement of the'parts described without departing from the invention. Hence I do not wish to limit myself to the details set forth, but shall consider myself at liberty to make such changes and alterations as fairly fall within the [spirit and scope ofthe appended claims.

I claim: r

1. A look including a relatively heavy slidable bolt, means for guiding the sliding movement thereof, the lower edge of the bolt being rack toothed, a pinion engaged with the rack teeth and aiding to sustain the weight of the bolt and provided with a notch, aspindle connected to the pinion, ahandle on the spindle for operating the bolt from the outside of a door on the inside of which the bolt is mounted, and a handle on the belt for directly sliding the same as the pinion idles and serves as a bearing, and means for locking the pinion against movement comprising a spring pressed bolt member engaging the notch in the pinion.

being rack toothed, a pinion engaged with the rack teeth gandaiding to sustain the weight of the bolt, said pinion being provided with a notch, a spindle connected to the pinion, a handle onthe spindle for operating the bolt from the outside of a door on the inside of which the bolt is mounted, and a handle on the bolt for directly sliding the same as the pinion idles and I serves as a bearing, and means for locking the pinion against movement comprising'ia springpressed bolt member engaging-the notch'in the pinion, a spindlefor operatinglthe pinion locking bolt, key controlled means 'for turning the spindle from'the outside ofa closure, anda handle for turningthe spindle fromthe inside of a closure.

HARRY w. EVANS. 

